A letter of invitation is required when visiting family or friends in Cyprus instead of staying in a hotel or other commercial accommodation. The letter must be certified and must include the full name, address, telephone number, and occupation of the host in Cyprus, along with a confirmation that they will be responsible for the applicant's accommodation during the visit. The letter must be accompanied by a copy of the host's passport or identity card and proof of their address in Cyprus. In the absence of a letter of invitation, a confirmed hotel booking or other valid proof of accommodation must be submitted with the application.